Minion Reflector | Worldgorger Dragon

Cards

Worldgorger Dragon in hand.
Minion Reflector on the battlefield.
You control at least three permanents that can tap to produce a total of at least ({3} magic symbol) .
({5} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) available.

Cast
Worldgorger Dragon by paying ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Worldgorger Dragon enters the battlefield, triggering itself and
Minion Reflector.
Resolve
Minion Reflector's trigger, paying ({2} magic symbol) and creating a token copy of
Worldgorger Dragon.
The
Worldgorger Dragon token enters the battlefield, triggering itself.
In response, activate any mana-producing permanents you control, adding at least ({3} magic symbol) .
Resolve the
Worldgorger Dragon token's ability, exiling all of your other permanents.
When the nontoken
Worldgorger Dragon leaves the battlefield, it triggers, doing nothing.
Resolve the nontoken
Worldgorger Dragon's ETB trigger from step 2, exiling the token
Worldgorger Dragon.
When the token
Worldgorger Dragon leaves the battlefield, it triggers, returning all of your permanents from exile to the battlefield.
Repeat from step 2 any number of times.
End the loop by declining to pay for a
Minion Reflector trigger.
If you control any other nontoken creatures, each of them triggers
Minion Reflector in step 9 and you may wait to resolve them until after you have ended the loop and resolved the final
Worldgorger Dragon ETB ability, creating an arbitrarily large number of creature tokens with haste.